Merge pull request #1 from exvacuum/navigation

Navigation

1 files changed, 53 insertions, 0 deletions

diff --git a/src/lua_api.rs b/src/lua_api.rs
new file mode 100644
index 0000000..cda2486
--- /dev/null
+++ b/src/lua_api.rs
@@ -0,0 +1,53 @@
+use bevy::prelude::*;
+use bevy_scriptum::{runtimes::lua::{BevyEntity, BevyVec3, LuaRuntime, LuaScriptData}, ScriptingRuntimeBuilder, Runtime};
+
+pub fn trigger_update(
+    mut scripted_entities: Query<(Entity, &mut LuaScriptData)>,
+    scripting_runtime: Res<LuaRuntime>,
+    time: Res<Time>,
+) {
+    let delta = time.delta_seconds();
+    for (entity, mut script_data) in scripted_entities.iter_mut() {
+        if let Err(e) = scripting_runtime.call_fn("on_update", &mut script_data, entity, (delta, )) {
+            error!("Encountered lua scripting error: {:?}", e);
+        }
+    }
+}
+
+// ACTUAL API STUFF BELOW THIS POINT {{{
+
+macro_rules! register_fns {
+    ($runtime:expr, $($function:expr),+) => {
+        { 
+            $runtime$(.add_function(stringify!($function).to_string(), $function))+
+        }
+    };
+}
+
+pub fn register(runtime: ScriptingRuntimeBuilder<LuaRuntime>) -> ScriptingRuntimeBuilder<LuaRuntime> {
+    register_fns!(runtime, translate, rotate)
+}
+
+fn translate(
+    In((BevyEntity(entity), BevyVec3(translation))): In<(BevyEntity, BevyVec3)>,
+    mut transform_query: Query<&mut Transform>,
+) {
+    if let Ok(mut transform) = transform_query.get_mut(entity) {
+        transform.translation += translation;
+    }
+}
+
+fn rotate(
+    In((BevyEntity(entity), BevyVec3(axis), angle)): In<(BevyEntity, BevyVec3, f32)>,
+    mut transform_query: Query<&mut Transform>,
+) {
+    if let Ok(mut transform) = transform_query.get_mut(entity) {
+        if let Ok(direction) = Dir3::new(axis) {
+            transform.rotate_axis(direction, angle);
+        } else {
+            warn!("Provided axis was not a valid direction!");
+        }
+    }
+}
+
+// }}}